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- W2950810081 abstract "We present the homogeneous analysis of a sample of Southern early-type M dwarfs in the solar neighborhood (d < 60 pc). We used the MCAL technique to derive the effective temperature Teff, metallicity [Fe/H], and activity index ia(Halpha) of 420 M stars using HARPS spectra. The effective temperature Teff, surface gravity log g, metallicity [Fe/H], and projected rotational velocity Vrotsini of 153 M0-M6 dwarfs were determined by fitting the observed intermediate-resolution spectra from the VIS arm of VLT/X-shooter with a grid of BT-Settl stellar atmosphere models. We estimated the typical uncertainties of the fit with X-shooter spectra by varying region-to-region results by σTeff ∼ 50 K, σlog g ∼ 0.2, and σ[Fe/H] ∼ 0.2 dex. Photometric verification of Teff for the 295 stars from the HARPS sample and the 61 stars from the X-shooter sample is also provided. We compared our results from different methods to estimate absolute uncertainty in determining the physical properties of M dwarfs." @default.
- W2950810081 created "2019-06-27" @default.
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- W2950810081 date "2019-06-21" @default.
- W2950810081 modified "2023-09-30" @default.
- W2950810081 title "Characterization of a Sample of Southern M Dwarfs Using Harps and X-shooter Spectra" @default.
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- W2950810081 doi "https://doi.org/10.3847/1538-4357/ab1fe9" @default.
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